Alumina powder

Alumina is a ceramic of chemical composition Al2O3. The structure, the purity, the hardness and the specific surface area are the main characteristics of these powders.

The differences between the products may seem minimal but the physico-chemical properties between two ranges are completely different. The calcination time varies from one range to another, while some alumina are harder, others softer. The granulometries and distributions are also different.

Our wide range of alumina powder will allow you to select the product best suited to your application. Sintering, filling and polishing powders are available. A specific powder to prevent parts sticking during heat treatment is also available.

For specific grain sizes, we can offer customised sieving. Please get in touch.

Main Products

100 Series: Alumina of medium purity, very high hardness, very low porosity and very low surface area.

200 Series: Alumina of high purity and hardness, low porosity and a specific surface area.

Chemical analysis: Al2O3 = 99.85% Na2O = 0.06%-0.08%

Granulometry: d50 between 3μm and 80μm

Filler for synthetic resins - Filler for elastomers

300 Series: This series is a little less pure than the 200 series and the specific surface area is a little larger. However, the product 007-0320 is much purer than the other alumina from the 300 and 200 series because it is specially made to measure to prevent smaller parts sticking during heat treatment.

400 Series: Alumina of medium purity but with a very specific large surface area.

Chemical analysis: Al2O3 = 99.6% Na2O = 0.3%

Granulometry: d50 between 0.6μm and 80μm

Incorporated with certain paints or inks, these alumina make it possible to obtain a particularly hard coating. The fineness of the alumina you use depends on the thickness of the layer of paint or ink.

500 Series: Alumina of lower chemical purity than previous series with a medium surface area.

Chemical analysis: Al2O3 = 99.6% Na2O = 0.3%

Granulometry: d50 between 3μm and 60μm

Filler for synthetic resins - Filler for elastomers

600 Series: Polishing alumina of rather low purity but with the technical characteristics needed for the different stages of polishing.

Chemical analysis: Al2O3 = 99.6% Na2O = 0.3%

Granulometry: d50 between 3μm and 60μm

Common or special industrial sanding/polishing

900 Series: Alumina granules with a large specific surface area, of medium purity and low hardness.

Chemical analysis: Al2O3 = 90% till 99.5%

Granulometry: d50 between 0.3mm and 10mm

Filtration, purification

1000 Series: Alumina with a medium surface area, high purity and medium hardness.